Car shaking/vibrating Issue

BGTV8

There was a problem with Australian Fords several years ago and the problem was eventually traced to one of 2 root causes:
1. "DTV" - Disk Thickness Variation or
2. Residual line pressure as a consequence of the pedal to booster rod being adjust too long (over extended)

Cause 1 is explained here:
FORD EA to EL Falcon

Cause 2 was eventually traced to a small number of assembly line workers who were installing the brake booster over-adjusted such that with no pedal pressure, the residual line pressure was keeping the pads in contact with the rotors and simply overheating them.

When the car is parked, pad deposits are left on the rotor as differential cooling occurs (the rotor under the pad remains hotter than the rest of the rotor and the area under the pad gets a deposit).

The fix was to remove the booster and adjust the rod from the brake pedal to permit around 2-3mm free play in normal driving so that with the brake pedal at the top of its stroke, there was zero residual line pressure as the pads were permitted to retract by a fraction of a mm and all was well with the world.

Cause 1 may not be your problem as Nissan wheel bearings are a cassette unit and sealed from the factory ............ I do not have a Ford Australia reference but any competent technician or senior service rep should comprehend the Cause 2 theory. Worst case, seek help from google

Rusty

Chevy had the same problem with the brake rods on the Chevettes when them made them. Had to fix a few of them. The factory fix was to install a 1/16"~1/8" shim between the firewall and booster.

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